Maintenance is generally performed with the device switched off. After switching off the device,
also disconnect the power plug.
Visually check the filters.
If the filters are dirty, the required flow rate can no longer be achieved, and the pump
speed fluctuates. The filters must be replaced. If water flows out of the GAS OUT opening,
condensation has occurred in the device and the filter must also be replaced.
To change both filters, proceed as follows:
1. Turn the device.
Fig. 30
2. Open the maintenance cover.
Fig. 31